Jaita, Yuttapoom, and Wanthiwa Chiangtung. “Leadership of the English Premier League Football Club Managers: A Case Study of Manchester United Football Club Management from 1986 To 2013”. Journal of Public Administration Chiang Rai Rajabhat University 4, no. 1 (June 16, 2021): 55–62. accessed August 29, 2026. https://so16.tci-thaijo.org/index.php/POPACRRU/article/view/823.